https://bugs.freedesktop.org/show_bug.cgi?id=50999

Bug #: 50999 Summary: [r300g, bisected] piglit glsl-fs-discard-04 fails Classification: Unclassified Product: Mesa Version: git Platform: Other OS/Version: All Status: NEW Keywords: regression Severity: normal Priority: medium Component: Drivers/Gallium/r300 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: pavel.ondracka@email.cz CC: eric@anholt.net, tstellar@gmail.com

Created attachment 62924 --> https://bugs.freedesktop.org/attachment.cgi?id=62924 RADEON_DEBUG=fp log

./bin/shader_runner tests/shaders/glsl-fs-discard-04.shader_test -auto -fbo Probe at (0,0) Expected: 0.000000 1.000000 0.000000 0.000000 Observed: 1.000000 0.000000 0.000000 0.000000 PIGLIT: {'result': 'fail' }

Regression test shows: e21b9f1f19d2345026a7fbe095a776d0b64557ec is the first bad commit commit e21b9f1f19d2345026a7fbe095a776d0b64557ec Author: Eric Anholt eric@anholt.net Date: Fri May 4 13:37:08 2012 -0700

glsl: Remove the opt_discard_simplification pass.

This conflicts with the GLSL 1.30+ rules for derivatives after a discard has occurred.

Reviewed-by: Kenneth Graunke kenneth@whitecape.org

llvmpipe works fine, so this may be another uncovered r300 compiler issue.

GPU:RV530 Kernel: 3.4.0-1.fc17.i686